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1.检测版本，弹框，确认是否需要升级；
2.下载apk流程；
主要代码
1.下载apk代码；安装APP权限申请；3.文件存储；
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.provider.Settings;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.FileProvider;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.HttpURLConnection;
import java.MalformedURLException;
import java.URL;
public class UpdateActivity extends AppCompatActivity {
private static final String TAG = UpdateActivity.class.getSimpleName();
private static final int PROGRESS = 100;//进度
private static final int DOWNLOAD_COMPLETE = 200;//下载完成
private static final int INSTALL_PERMISS_CODE = 500;//安装权限
private static final int INSTALL_COMPLETE = 600;
private Button btnDownInstall;//下载安装
private static String appDownloadUrl = "your apk url";//下载文件的地址
private static int down = 0;//状态码
File file;
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case DOWNLOAD_COMPLETE:
Toast.makeText(mContext, "下载完成,准备安装！", Toast.LENGTH_SHORT).show();
installApk();
break;
case PROGRESS:
String result = (String) msg.obj;
mTvProgress.setText(result);
break;
}
}
};
private TextView mTvProgress;
private Context mContext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_update);
initParamsAndValues();
initView();
}
private void initParamsAndValues() {
mContext = this;
}
private void initView() {
btnDownInstall = (Button) findViewById(R.id.btn_down_install);
btnDownInstall.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
downFile(appDownloadUrl);
}
});
mTvProgress = findViewById(R.id.tv_progress);
}
// 接收到安装完成apk的广播
BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "安装完成！", Toast.LENGTH_SHORT).show();
Message message = handler.obtainMessage();
message.what = INSTALL_COMPLETE;
handler.sendMessage(message);
}
};
/**
* 后台在下面一个Apk 下载完成后返回下载好的文件
*
* @param httpUrl
* @return
*/
private File downFile(final String httpUrl) {
new Thread(new Runnable() {
@Override
public void run() {
try {
URL url = new URL(httpUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(5000);
FileOutputStream fileOutputStream = null;
InputStream inputStream;
if (connection.getResponseCode() == 200) {
inputStream = connection.getInputStream();
if (inputStream != null) {
final int appLength = connection.getContentLength();
file = getFile(httpUrl);
fileOutputStream = new FileOutputStream(file);
byte[] buffer = new byte[1024];
int length = 0;
int total = 0;
while ((length = inputStream.read(buffer)) != -1) {
//写入文件中
fileOutputStream.write(buffer, 0, length);
//统计进度
total += length;
String result = total * 1.0 / appLength * 100 + "%";
Message message = handler.obtainMessage();
message.what = PROGRESS;
message.obj = result;
handler.sendMessage(message);
}
fileOutputStream.close();
fileOutputStream.flush();
}
inputStream.close();
}
//下载完成,开始安装
Message message = handler.obtainMessage();
message.what = DOWNLOAD_COMPLETE;
handler.sendMessage(message);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
return file;
}
/**
* 安装APK
*/
private void installApk() {
Intent intent = new Intent(Intent.ACTION_VIEW);
if (file != null && file.exists()){
// 兼容7.0
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Uri contentUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".fileProvider", file);
intent.setDataAndType(contentUri, "application/vnd.android.package-archive");
//兼容8.0
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
boolean hasInstallPermission = mContext.getPackageManager().canRequestPackageInstalls();
if (!hasInstallPermission) {
startInstallPermissionSettingActivity();
return;
}
}
} else {
// <7.0
intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
}
// activity任务栈中Activity的个数>0
if (mContext.getPackageManager().queryIntentActivities(intent, 0).size() > 0) {
mContext.startActivity(intent);
}
}
}
private void startInstallPermissionSettingActivity() {
//注意这个是8.0新API
Uri packageURI = Uri.parse("package:"+getPackageName());
Intent intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES,packageURI);
startActivityForResult(intent, INSTALL_PERMISS_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// 授权完成
if (resultCode == RESULT_OK && requestCode == INSTALL_PERMISS_CODE) {
Toast.makeText(this,"安装应用",Toast.LENGTH_SHORT).show();
installApk();
} else {
Toast.makeText(this,"授权失败，无法安装应用",Toast.LENGTH_SHORT).show();
}
}
@Override
protected void onStart() {
super.onStart();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);
intentFilter.addDataScheme("package");
// 注册一个广播
registerReceiver(broadcastReceiver, intentFilter);
}
@Override
protected void onDestroy() {
super.onDestroy();
// 解除广播
unregisterReceiver(broadcastReceiver);
}
/**
* 根据传过来url创建文件
*/
private File getFile(String url) {
// 使用缓存目录,这个时候不需要申请存储权限
// 目录不存在，那么创建
File dir = new File(getExternalCacheDir(),"download");
if (!dir.exists()){
dir.mkdir();
}
// 创建文件
File file = new File(dir,getFilePath(url));
return file;
}
/**
* 截取出url后面的apk的文件名
* @param url
* @return
*/
private String getFilePath(String url) {
return url.substring(url.lastIndexOf("/"), url.length());
}
}
兼容Android 12 版本 存储权限处理：
1.新建xml文件；
<?xml version="1.0" encoding="utf-8"?>
<resources>
<external-cache-path path="/download" name="download"/>
</resources>
2.manifest配置文件：
<provider
android:authorities="你的包名.fileProvider"
android:name="androidx.core.content.FileProvider"
android:exported="false"
android:grantUriPermissions="true"
>
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
注，可运行下载链接 APP内升级代码源码
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